Expansible shoe-last.



C. SCHEVITZ.

EXPANSIBLE SHOE LAST.

APPLICATION FILED AUG. I6, |916.

1 ,223,206. Patented Apr. 17, 1917.

2 SHEETS-SHEET I.

* i @ad Schwaz,

@Wines/.seo

r vonnis srl-ns coA, nlnnrurna. wasumcmu. m c.

C. SCHEVITZ.

EXPANSIBLE SHOE LAST.

APPLICATION FILED AUG. I6. 191B- 1,223,2G6. y `mami Apr. 17,1917.

2 SHEETS-SHEET 2.

onen.

CARL scHnvITz, oraAcxsoNVrLLE, FLORIDA.

' ExPANsiBLE 'SHOE-LAST.

Jacksonville, in the county of Duval andv State of Florida, haveinvented newand useful Improvements in Expan'sible Shoe- Lasts, of.which the following is' a specifi'- cation.

This invention relates to expansible shoe lasts and has particularapplication to an improvement of that coveredin my prior Patent No.1,184,577 patented May 23, 1916. The chief characteristic of thisinvention is to provide improved means operable from the exterior oftheA shoe for adjusting and laterally moving the stretching elements,whereby I eliminate the use of nu# merous pinions thus, reducing thecost of the device to a minimum.

Another characteristic of this invention 'resides in the provision of adevice of the above described character having means for so mounting thestretching elements as to permit of a greater' adjustment thereof thanthat ydisclosed in the above mentioned patent, the said means beingslidably mounted and operable exteriorly of the shoe.

Other objects of the invention will appear as the specification is readin connection with the accompanying drawings in which Figure l is a topplan view partly in section, showing the'device constructed inaccordance with my invention;

Fig. 2 isy a vertical longitudinal section taken on the line 2-2 of Fig.1;

Fig. 3 is a transverse section taken on the line 3 3 of Fig. 1;

Fig. 4 is a .vertical transverse section taken on the line 4 4 of Fig.1;

Fig. 5 is a detailed perspective of the frame.

Referring to the drawings in detail, my invention comprises a framegenerally indicated as at A which is elongated and of substantiallyrectangular formation, and comprises the side bars 1, the forward endbar 2 and the rear end bar 3, the latter being curved in the form of anarc to conform to the contour of the inner heel portion of the shoe. Theend bars 2v and 3 are connected by the parallel spaced longitudinallyextending bars 4, having shown in this instance two bars which coperatewith the side bars 1 to form guideways for the Specification of LettersPatent.

ratenfe'a'npr. 17, 1917.

Application filed August 16, 1916. Serial No. 115,249.

'yokes as will be hereinafter described. The

sidebars 1 and the longitudinally extending bars 4 are each providedwithlongitudlnal extendingregistering slots 5, theslots vbeingpreferablyarranged at' the medial portion ofthe bars as is 'clearlyshown in Fig. 5vof the drawings Mounted between each pair ofbars 1 and 4are the yokes or frames generally indicated as at B, 'each of whichcomprise the sidemembers 6 and the end members 7, the side membershaving'their opposite ends formed with Ilongitudinally extending,extensions 8 which project an appreciable' distance beyond the endmembers y7 as is clearly shown in Fig. 1 'of the drawings. The yokes Bare relatively shorter than the frame A and have the side members 6provided with laterally extending trunnions 9 which are adapted to ridewithin the slots 5, thereby holding the yoke within the frame A and atthe same time permitting sliding movement of the yokes, the oppositeextremities of the slots limiting the movement of the yokeas will beunderstood. Mounted within each of the lyokes B and extendinglongitudinally of the same is an extensible shaft C, the section 10 of-which is journaled within the outer end member 7 while the section 11is slidably mounted within the inner end member 7. The section 11 ispreferably rectangular in cross section and has one end thereof boredlongitudinally and threaded to receive the threaded inner extremity 12of the'se'ction 10, while the opposite end is normally disposed betweenthe inner extension 8 and is tapered toward one edge to provide the camsurface 13. The outer ends of each of the sections 10 are disposedbetween the outer extensions 8 and are each provided with a beveledpinion 14while rigidly secured to the outer extensions 8 are theopposite extremity of a U-shaped handle 15, thelatter being verticallydisposed and arrangedi at right angles tothe frame A. The end ofv eachof the handles l'l-areconnected by means of the bearing liwhileextending longitudinally of the "handle is a shaftv 17 which has itsopposite end j ournaled in the upper end of the handle and the bearing16 respectively, the lower end oftheY shaft being disposed between theouter extension 8` of the yoke B and provided with a beveled pinion 18which is ladapted to mesh with and drive the pinion 14. The upper endsof each of the -shafts 17 are provided with operating heads 19 Which arein this instance in the form of milled Wheels.

Arranged upon the opposite sides of the frame A and adjacent its innerend are the side stretching elements D Which are similar to that shownin my prior patent. The stretching elements D, are provided upon theirconfronting sides with a shank 20 which extends through the slots 5formed in the side members 1 and the outer extension of the innerextensions 8, its inner end being inclined transversely to provide thecam surface 21. This cam surface 21 is adapted to engage thecam surface13 of the sections 11 as Will be hereinafter described. The toestretching element as indicated at E is of any suitable construction andis provided With an extendible shaft C comprising the sections 10 and11, the same being constructed in a manner similar to the previouslydescribed shaft C With the exception that the section 11 is not providedwith a cam surface but is extended through the end Wall 2 of the frame Aand is formed integral With the toe stretching element E. This element Eis actuated in a manner similar to that shown in my 'previouslymentioned patent, parallel bars 4 being provided With a handle 22 Whichis pivotally mounted thereon and in Which a shaft 23 is journaled, theloWer end of the shaft being provided with a beveled gear 24: Which isadapted to mesh and drive the pinion 18 formed on the outer end of thesection 10.

In operation, 'the frame A is inserted in a shoe the operating head anda portion of the handles 15 and 22 projecting from the /top of the shoeas Will be understood. By rotating the shafts 17 and 23 through themedium of the head 19, the sections 10 of the shaft C Will be rotated soas to advance or retract the sections 11 and consequently the camsurfaces 13. Assuming that` the sections 11 have been moved forwardly,they will be caused to engage the cam surfaces of the shanks 20 therebycausing the side stretching elements to be moved laterally of the frameand thus exerting an outward pressure against the upper shoe. Vhen it isdesired to adjust the side stretching elements E to a point upon theupper of the shoe, the elements being carried by the yokes B, by slidingthe latter between the bars 1 and A, a corresponding adjustment Will beimparted to the side stretching elements E,

the trunnions 9 working Within the slots 5 as has been described. Afterthe shoe has been sufficiently stretched, the device may be Withdrawnfrom the shoe by reversing the operation of the shaft to retract thesections 11 thus permitting the shanks 20 to be moved inwardly into theframe thereby causing the side stretching elelnents to disengage theupper of the shoe as will be understood.

It Will be evident from the foregoing that 1 have provided simple andeflicient means for actuating the side stretching elements to properlystretch the upper' of the shoe and thatthe said elements'may be adjustedto any part of the upper by movement of the yoke B.

That l claim is 1. An expansible shoe last comprising a frame, a Vyokeslidably mounted in the frame, extensible shafts journaled in the yoke,and stretching elementsr movable in the` frame and having a camengagement with said shaft.

2. An expansible shoe `last comprising a frame, yokes movable -in theframe, extensible shafts journaled in the yoke, stretching elementsmovable in and with the yoke and having a cam engagement with the saidshafts, and means operable exteriorly of a' shoe for independentlymoving each of the yokes and stretching elements.

3. An expansible shoe last comprising a frame, a plurality of extensibleshafts journaled in and moving longitudinally of the frame, stretchingelements movable in the frame and with the shafts and having a camengagementivith the shafts, and means operable exteriorly of the shoefor extending the shafts to move the stretching elements and for movingthe shafts longitudinally of the frame.

4f. An expansible shoe last comprising a frame, L-shaped vokes slidablein the frame` shafts journaled in each arm of the yoke and engageablewith each other, one of said shafts being formed of extensible sectionsthreadedly engaging each other, one of the sections having a camsurface, and stretching elements movable in the yokes and having camsurfaces engageable with the cam surfaces of said sections for movingthe elements laterally of the frame.

ln testimony whereof l alix my signature.

CARL SCHEVITZ.

Gopies of this patent may be obtained for ve 'cents each, by addressingthe Commissioner of Patents, Washington, D.

